import Vue from 'vue'

export function textAnimate1(){
  var radius = 60;//标签之间的距离
  var dtr = Math.PI / 180; //转的速度
  var d = 300;//字号
  var mcList = [];
  var active = false;//是否自动转动
  var lasta = 1;
  var lastb = 1;
  var distr = true;
  var tspeed = 10;
  var size = 20;
    
  var mouseX = 0;
  var mouseY = 0;
    
  var howElliptical = 1;
    
  var aA = null;
  var oDiv = null;
    
  var  sa = null;
  var  ca = null;
  var  sb = null;
  var  cb = null;
  var  sc = null;
  var  cc = null;
  var per = null;
    var i = 0;
    var oTag = null;
    
    oDiv = document.getElementById('tagsList');
    aA = oDiv.getElementsByTagName('a');
    
    for (i = 0; i < aA.length; i++) {
      oTag = {};
      oTag.offsetWidth = aA[i].offsetWidth;
      oTag.offsetHeight = aA[i].offsetHeight;
      mcList.push(oTag);
    }
    
    sineCosine(0, 0, 0);
    
    positionAll();
   oDiv.onmouseover = function () {
      active = true;
    };
    /*  oDiv.onmouseout = function () {
      active = false;
    };
     */
    oDiv.onmousemove = function (ev) {
      var oEvent = window.event || ev;
      mouseX = oEvent.clientX - (oDiv.offsetLeft + oDiv.offsetWidth / 2);
      mouseY = oEvent.clientY - (oDiv.offsetTop + oDiv.offsetHeight / 2);
    
      mouseX /= 5;
      mouseY /= 5;
    };
    setInterval(update, 30);
  function update() {
    var a;
    var b;
    if (active) {
      a = (-Math.min(Math.max(-mouseY, -size), size) / radius) * tspeed;
      b = (Math.min(Math.max(-mouseX, -size), size) / radius) * tspeed;
    }
    else {
      a = lasta * 0.98;
      b = lastb * 0.98;
    }
    lasta = a;
    lastb = b;
    
    if (Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {
      return;
    }
    
    var c = 0;
    sineCosine(a, b, c);
    for (var j = 0; j < mcList.length; j++) {
      var rx1 = mcList[j].cx;
      var ry1 = mcList[j].cy * ca + mcList[j].cz * (-sa);
      var rz1 = mcList[j].cy * sa + mcList[j].cz * ca;
    
      var rx2 = rx1 * cb + rz1 * sb;
      var ry2 = ry1;
      var rz2 = rx1 * (-sb) + rz1 * cb;
    
      var rx3 = rx2 * cc + ry2 * (-sc);
      var ry3 = rx2 * sc + ry2 * cc;
      var rz3 = rz2;
    
      mcList[j].cx = rx3;
      mcList[j].cy = ry3;
      mcList[j].cz = rz3;
    
      per = d / (d + rz3);
    
      mcList[j].x = (howElliptical * rx3 * per) - (howElliptical * 2);
      mcList[j].y = ry3 * per;
      mcList[j].scale = per;
      mcList[j].alpha = per;
    
      mcList[j].alpha = (mcList[j].alpha - 0.6) * (10 / 6);
    }
    
    doPosition();
    depthSort();
  }
    
  function depthSort() {
    var i = 0;
    var aTmp = [];
    
    for (i = 0; i < aA.length; i++) {
      aTmp.push(aA[i]);
    }
    
    aTmp.sort(function (vItem1, vItem2) {
      if (vItem1.cz > vItem2.cz) {
        return -1;
      }
      else if (vItem1.cz < vItem2.cz) {
        return 1;
      }
      else {
        return 0;
      }
    });
    for (i = 0; i < aTmp.length; i++) {
      aTmp[i].style.zIndex = i;
    }
  }
  function positionAll() {
    var phi = 0;
    var theta = 0;
    var max = mcList.length;
    var i = 0;
    
    var aTmp = [];
    var oFragment = document.createDocumentFragment();
    
    //随机排序
    for (i = 0; i < aA.length; i++) {
      aTmp.push(aA[i]);
    }
    
    aTmp.sort(function () {
      return Math.random() < 0.5 ? 1 : -1;
    });
    for (i = 0; i < aTmp.length; i++) {
      oFragment.appendChild(aTmp[i]);
    }
    oDiv.appendChild(oFragment);
    for (var i = 1; i < max + 1; i++) {
      if (distr) {
        phi = Math.acos(-1 + (2 * i - 1) / max);
        theta = Math.sqrt(max * Math.PI) * phi;
      }
      else {
        phi = Math.random() * (Math.PI);
        theta = Math.random() * (2 * Math.PI);
      }
      //坐标变换
      mcList[i - 1].cx = radius * Math.cos(theta) * Math.sin(phi);
      mcList[i - 1].cy = radius * Math.sin(theta) * Math.sin(phi);
      mcList[i - 1].cz = radius * Math.cos(phi);
    
      aA[i - 1].style.left=mcList[i - 1].cx+oDiv.offsetWidth /2-mcList[i - 1].offsetWidth/2+'px';
      aA[i - 1].style.top=mcList[i - 1].cy+oDiv.offsetHeight/2-mcList[i - 1].offsetHeight/2+'px';
    }
  }
  function doPosition() {
    var l = oDiv.offsetWidth / 2;
    var t = oDiv.offsetHeight / 2;
    for (var i = 0; i < mcList.length; i++) {
      aA[i].style.left = mcList[i].cx + l - mcList[i].offsetWidth / 2 + 'px';
      aA[i].style.top = mcList[i].cy + t - mcList[i].offsetHeight / 2 + 'px';
    
      // aA[i].style.fontSize = Math.ceil(12 * mcList[i].scale / 2) + 8 + 'px';
    
      aA[i].style.filter = "alpha(opacity=" + 100 * mcList[i].alpha + ")";
      aA[i].style.opacity = mcList[i].alpha;
    }
  }
  function sineCosine(a, b, c) {
    sa = Math.sin(a * dtr);
    ca = Math.cos(a * dtr);
    sb = Math.sin(b * dtr);
    cb = Math.cos(b * dtr);
    sc = Math.sin(c * dtr);
    cc = Math.cos(c * dtr);
  }
}
